--- title: "CVE-2026-109140: Krill - Weak Cryptography" description: "Krill contains a weak cryptography vulnerability caused by reuse of (key, nonce) pairs for encrypting login-session tokens due to nonce counter reset on restart, letting attackers potentially decrypt or forge tokens, exploit requires attacker to observe encrypted tokens across restarts." url: https://panop.io/threat-heartbeat/CVE-2026-109140/ --- # CVE-2026-109140 Krill - Weak Cryptography Krill contains a weak cryptography vulnerability caused by reuse of (key, nonce) pairs for encrypting login-session tokens due to nonce counter reset on restart, letting attackers potentially decrypt or forge tokens, exploit requires attacker to observe encrypted tokens across restarts. CVSS base score 8.4 /10 High CISA KEV Not listed Public exploit None known [View the NVD record ↗](https://nvd.nist.gov/vuln/detail/CVE-2026-109140) ## Details Type Weak Cryptography Impact Privilege Escalation CVSS vector CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:L Published 2 November 2026 Updated 3 November 2026 Weakness [CWE-323](https://cwe.mitre.org/data/definitions/323.html) ## Vendor fix Update to a version that uses unique nonces per encryption or the latest version. Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them. ## References - [https://nvd.nist.gov/vuln/detail/CVE-2026-109140](https://nvd.nist.gov/vuln/detail/CVE-2026-109140) - [https://www.nlnetlabs.nl/downloads/krill/CVE-2026-109140.txt](https://www.nlnetlabs.nl/downloads/krill/CVE-2026-109140.txt) [← All CVEs](https://panop.io/threat-heartbeat/) ## What this record can't tell you - Whether you run the affected software, and where - Whether an attacker can actually reach and exploit it - The misconfigurations that never get a CVE number - What it would cost the business, ranked into what to fix first Panop answers these inside your environment, for this CVE and every other finding. [Book a demo](https://panop.io/demo)